On Thursday, March 1, 2018 at 9:31:26 PM UTC-5, Mike Bayer wrote:

not that I'm aware of.   it's a matter of whichever is more convenient 
> given the kind of expression that is applied with DESC (e.g. a more 
> complex expression might look more natural enclosed in desc()). 
>

I've had some advanced queries with joins/unions in the past where a 
`.desc()` didn't work and they needed to be wrapped as `desc(foo)`.  I 
think those edge cases have all been resolved in the past few years.

as a style convention, our code always uses `column.desc()` unless it can't.

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